docs: def add_tags(self):
          """Add tags to security group.
  
          Returns:
              True: Upon successful completion.
          """
          session = boto3.session.Session(profile_name=self.env, region_name=self.region)
          resource = session.resource('ec2')
          group_id = get_security_group_id(self.app_name, self.env, self.region)
          security_group = resource.SecurityGroup(group_id)
  
          try:
              tag = security_group.create_tags(
                  DryRun=False,
                  Tags=[{
                      'Key': 'app_group',
                      'Value': self.group
                  }, {
                      'Key': 'app_name',
                      'Value': self.app_name
                  }])
              self.log.debug('Security group has been tagged: %s', tag)
          except botocore.exceptions.ClientError as error:
              self.log.warning(error)
  
          return True